Pump-plunger.



H. F. SCHUMANN. PUMP PLUNGER. APPLICATION FILED APR. 18, 1914.

Patented J an. 11 1916.

Specification of Letters Patent.

Patented Jan; 11, 1916.

Application fi1ed April 18, 1914. Ser1'al N o. 832,869.

T0 all w/z0m it may concem Be it known that I, HARRY F. SCHUMANN, a citizen of the Unii;ed States, residing at 0s Gatos, in the cunty of Santa Clara and State of California, have invented 0ertain new and useful Improvements in Pumplungers; und I 010 lowing to be a full, clear, und exact description of the invention, such as Will enable h art to which it apperthe same.

pump plunger's,

others skilled in the tains to make and use This invention relates t0 d'esigned more particularly for use With air pufnps, but capable of use on plungers generally and f0r piston heads for various uses, und one of the principal objects of the' invention is to provide reliable and efficient means of simple c'onstruction for yieldingly pressing the packing of the piston head or.p plunger outward against the inner Wall of the cylinder or suction pipe.

Another object of the inv ntion is to provide a plunger head \01 piston comprising two members having oppositely beveled pe ripheral surfaces between Which the pack- -ing is disposed, und said two members being yieldingly connected together so as to co pensate for Variations in the diameter of the interior Walls -of the cylinder and to force the packing outwardly, automatically and yieldingly.

These and other objects may be attained by means of the construdtion illustrated in t e accompanying draWing, in which the figure is a vertical sec'tion taken vthrough the cylinder and the plunger head.

eferring to the drawin'g, the numeral 1 designates a pump casing, Which may be of any suitable size and construction, said casing being provided with a th'readed cap or head 2. An air qutlet nipple 3 is pr ovided may be pfovided With a suitable flexible tube 5 of the usual construction.

Fitted Within the casing 1 is a plunger head or piston comprising the two members 6 and 7. The member 6 1's provid'ed With a beveled surface 8 near its periphery, and the hereby declare the foly 3 111g, ovving t0 member 7 1's provided with an oppomtely beveled surface 9 near its periphery.- The member 6 is form to the arms 19 integrally connedted to the member are provided with a centrally disposed threaded boss 20 to receive the plunger rod 21.

From the foregoing it will be obvious that the packing 18 will be forced outwardly to orm an air tight connection between said packlng and the inner Wall of the pump casthe construction 0f the beveled surfaces of the members 6 and 7 and the action of the gether. It Will also be apparent that the nut 12 may be adjusted to regulate the tension of the spring and to force the packing out- Ward und to yield With the action of the plunger.

ariouschanges may be made in the deta1ls of construction without departing from the spirit and scope of the invention as defined.in the claim.

hat is claimed is:-

A piston head comprising a lower platze and an upper plate, a spider made integral with the upper plate, a sucker rod connect9d to said spider, said plates each having oppositely disposed annular.beveled Surfaces, a, stud made integral with the lower plate and extending through said upper plate \to ap- The spider stud, a spr1 ng' encirchng sa1d stud and m- 5 terposed between said adjusting nut and upper plate whereby the said gasket is forced.

ou tw ardly.

In testimony whereof I aflix my signature in presence of two witnssses.

HAR BY F. SCHUMANN.

Witness'ess HENRY SCHUMANN, BELLE B. SCHUMANN. 

